Deformed bar.



CLAUDE A. ".P. TURNER, OF MINNEAPOLIS, MINNESGTA.

DEFORMED aan.

Application led July 2, 1918.

To au vwhom t may concern:

Beit known that I, CLAUDE A. P. TUR- Nnu, a citizen of the'UnitedStat-es, residing in the city of Minneapolis, in the county of Hennepin,in the State of Minnesota, have invented certain new and usefulImprovements in Deformed Bars, and have de' scribed the same in thefollowing specification, illustrated bythe accompanying drawings.

My invention relates to that class of deformed bars which are commonlyused for reinforcement of concrete constructiomand which areindividually provided with a plurality of projections, surfaceirregularities. or socalled deformations` for the purpose of increasingthemechanical bond resistance operatively occurring between thel bar andthe concrete in which it is embedded. It is the main object of theinvention to facilitate the formative process of rolling` a bar of thisclass; to avoid reducing the strength of the bar in its final passbetween the rollers. and to provide the barvvith all necessary ordesirable deformations without producing thereby any avoidable reductionof its strength; to distribute the mechanical bond resistance of thedeformations uniformly around 'the body of the barz' at the same time toadapt the completed bar to be bended, as use may require` in either orboth of two planes, at right angles with each other, without anyinterference between the deformations and the bending rolls; and ingen-f eral to produce a" deformed bar of simple design and easyconstruction, and of superior convenience and eiiciency. To accomplishthese. objects I incorporate in my improved bar, as parts thereof, a cvlindrically round bar body and a plurality of spaced projecting ribs,formed integrally therewith, which have a special form, a specialindividual arrangement and a special distribution upon the round body.

In said drawings, illustrating the best manner in Which I havecontemplated applying the principles of the invention ,`Fig ure 1 is aside elevation of a specimen por- .tionof a deformed bar which isconsti-noted in accordance with 'these principles. Fig. Q is across-section of the same bar on the section line 2-2 of Fig. l. Fig. 3is a side elevation of Athe same portion of the same bar rotated in thedirection ofthe arrow in Fig 2V throughan angle of forty-five de, `.Ofrees from the position shown in that gure.

Specification of Letters Patent.

Patented Dec. 24, 1918.

Serial No. 243,000.

Fig. 4 is a cross-section on the section line e-i of F ig. 3. Fig. 5 isa partial axial section of the same bar.

In the illustrated specimen of inyvinvention the body of the bar is astraight round rod, denoted by the numeral 6. It is of any desired orpredetermined length, and is pro vided with a plurality of ribs, 7, 8,9, 10, formed integrally therewith and thereon by the operation offormatively compressing the rod between rolls. in side elevation theform of a crescent, as shown in' Figs. :Z and e; and in cross sectionresembles a truncated screw-thread, as shown in Fig." 5. These ribs areindividually disposed in circumferential directions on the periphery ofthe bar body, and are uniformly spaced apart in four separated seriesextending lengthwise of the bar. andcomprising the ribs T. 8, 9 and l0respectively. Each series forms part of a single sector of the bar, andeach ribspans an arc of approximately sixty, and not more than ninety.degrees of such sector; so that in an end elevation of the described'bar all the ribs are seen to lie within a circumscribed square i whosesides are tangent to the body (S. The

ribsef each sector are spaced uniformly apart a distance preferablyexceeding the diameter of the bar; those of diametrically oppositesectors are directly opposite: and those 4of adjacent sectors are iurelatively staggered positions, as show-'11.

As the ribs are distributed uniformly around the body of the bar. thehond resistance referred lto is operatively distrib uated in the samemanner; as the individual ribs lie eircumferentially and not lengthwiseof the bar, they are neither weakened nor ruptured by longitudinaltension or compression when the bar is bent; and, as the deformationslie Within said circumscribed square, the bar can be passed betweenbending rolls without either choking the rolls orflattening out theribs, and can be bended in either of two rectangularly intersectingplanes with equal smoothness and Asame size and shape and being small inEach of these ribs has sov with respect to the ribs in any adjacent rowund each rib being One of a pair of diametrienlly opposite ribs, wherebythe mechanienl bond of the Concrete to the beii will 10 be equallydistributed and the bar may be.

bent in two directions at right angles Without interference with` theribs.

fitness my s'` mature at Minneapolis, Minnesota, Junel1 1918. CLAUDETA.-P. TURNER.

